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Oligomerization of isobutene over dealuminated Y zeolite catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
43639 45980 2008 5 PDF Available
Title
Oligomerization of isobutene over dealuminated Y zeolite catalysts
Abstract

Oligomerization of isobutene to produce oligomers such as trimers and tetramers has been investigated over dealuminated Y zeolite catalysts that were obtained by calcination at temperatures in the range of 500–700 °C in the presence of steam. Relatively stable isobutene conversion and high selectivity for trimers and tetramers are attained over a dealuminated Y zeolite by steam-treatment at 600 °C. The observed stable performance with the increased selectivity is attributed to the high concentration of Lewis acid sites. Moreover, a deactivated catalyst can be regenerated easily by simple calcination in air. The present study demonstrates that a steamed zeolite having high concentration of Lewis acid sites, even with decreased crystallinity and porosity, is one of the potential catalysts to exhibit stable and high conversion, high selectivity (for trimers and tetramers) and facile regeneration for the oligomerization of isobutene. However, the contribution of a strong or new acid site for the stable catalysis cannot be ruled out.

Graphical abstractRelatively stable isobutene conversion and high selectivity for isobutene trimers and tetramers are attained over a dealuminated Y zeolite that was obtained readily by steam-treatment at 600 °C. The observed stable operation and increased selectivity for trimers and tetramers are attributed to the high concentration of Lewis acid sites.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Y zeolite; Dealumination; Isobutene; Oligomerization; Lewis acid site
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Oligomerization of isobutene over dealuminated Y zeolite catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 337, Issue 1, 15 March 2008, Pages 73–77
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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Price after discount Only $4.95
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